Structural, morphological, dielectric and magnetic investigations of cobalt-nano-ferrite-doped Zn2+ by auto-combustion

Co1–xZnxFe2O4 (x = 0.0, 0.2, 0.4, 0.6, 0.8) cobalt zinc nanoferrites (CZF) nanoparticles were created in this study utilizing the auto-ignition procedure with citric acid as an oxidizing agent. Following thermogravimetric–differential thermal analysis, the prepared Co1–xZnxFe2O4 powder was sintered at 1000°C for 4 h. The single-phase cubic structure of Co-Zn ferrite nanoparticles was described by X-ray diffraction studies, and its outcomes show particle size fluctuation. Fourier transform infrared spectra show that phase formation occurred. Due to the ferrite samples, scanning electron microscope images demonstrate the aggregation of spherical grains. Peaks of the corresponding components Co, Zn, Fe and O were seen in the energy dispersive X-ray spectra, indicating the production of cobalt zinc ferrite. By employing a vibrating sample magnetometer to evaluate the magnetic characteristics of the ferrite output, soft ferrite material was found to be present. The range 58.55–74.46 nm is discovered to be the average crystallite size of the ferrite nanoparticles produced by field emission-scanning electron microscope. Transmission electron microscopy elaborates clustering of grains. With increase in Zn content in cobalt zinc ferrite nanoparticles, hysteresis loops were shown to be modified for magnetic characteristics, which include Ms, Mr, Hc and Mr/Ms. CZF nanoferrites can be employed in microwave devices because of their dielectric properties, i.e., the tangent loss is lower at high frequencies. Co0.2Zn0.8Fe2O4 exhibits surprisingly high dielectric permittivity with small dielectric loss and can be exploited for power storage at high frequencies. These results indicate CZF as a promising nanomaterial with unique technological applications.